<template>
  <view class="cart-container" v-if="cart.length !== 0">
    <!-- 收货地址区域 -->
    <my-address></my-address>
    
    
    <!-- 商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧图标 -->
      <uni-icons type="cart-filled" size="18"></uni-icons>
      <!-- 右侧文本 -->
      <text class="cart-title-text">购物车</text>
    </view>
    
    <!-- 循环渲染购物车中的商品信息 -->
    <uni-swipe-action>
      <block v-for="(item, i) in cart" :key="i">
        <uni-swipe-action-item :right-options="options" @click="swiperActionClickHandler(item)">
          <my-goods :item="item" :showRadio="true" :showNumberBox="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>
        </uni-swipe-action-item> 
      </block>
    </uni-swipe-action>
    
    <!-- 使用自定义的结算 -->
    <my-settle></my-settle>
    
  </view>
  
  
  <!-- 空白购物车页面 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" mode="" class="empty-img"></image>
    <text class="tip-text">空空如也</text>
  </view>
</template>

<script>
  // 导入设置tabbar 购物车徽标的mixin
  import badgeMixin from '@/mixins/tabbar-badge.js'
  // 按需导入 mapState 这个辅助函数
  import { mapState, mapMutations } from 'vuex'
  
  export default {
    mixins: [badgeMixin],
    computed: { ...mapState('m_cart', ['cart']) },
    name: 'myCart',
    data() {
      return {
        options: [{
          text: '删除',
          style: { backgroundColor: '#c00000' }
        }]
      }
    },
    methods: {
      ...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
      radioChangeHandler(e) {
        // console.log(e) 
        this.updateGoodsState(e)
      },
      numberChangeHandler(e) {
        // console.log(e)
        this.updateGoodsCount(e)
      },
      swiperActionClickHandler(e) {
        // console.log(e)
        this.removeGoodsById(e.goods_id)
      }
    }
  }
</script>

<style lang="scss">
.cart-container {
  padding-bottom: 50px;
}
.cart-title {
  height: 40px;
  display: flex;
  align-items: center;
  padding-left: 14px;
  border-bottom: 1px solid #efefef;
  
  .cart-title-text {
    font-size: 14px;
    margin-left: 10px;

  }
}

.empty-cart {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 200px;
  
  .empty-img {
    width: 100px;
    height: 100px;
  }
  .tip-text {
    font-size: 12px;
    color: #bcbcbc;
  }
}
</style>
